This is not the answer you expect, nor, I imagine, the one you want, but I believe it to be a necessary answer.
The real answer is that you have an anxiety problem, probably of a degree that would be identified as an an anxiety disorder ... and it is that problem for which you should seek professional help.
I'll repeat that. You should consider seeking professional help.
Crystal-ball based reassurance on SE Academia is most unlikely to help. You might be reassured about thisthis question. There will be another tomorrow. That is the nature of anxiety disorders.
Your post is over 500 words long and most of those 500 words don't concisely ask a question. You say that you had to try to squeeze your whole question into the 50 character title (you don'tdidn't, and most people don't try!) by omitting essential words.
And your question is a follow-on to several other questions in the same vein ... "Is it possible that disaster X could befall me?"
The answer to that question is most definitely yes. Unexpected disaster can strike at any time. With what likelihood? So close to zero for some things that we might as well call it zero. For other things, there are black-swan events ... because the probability distribution is heavy-tailed. An auditor coming and checking your thesis and that in turn leading to disaster, well, that would most definitely be a black-swan event!